Shutter-worker.



No. 795,644. PATENTED JULY 25, 1905.

H. OSBORNE.

S TER WORK APPLI on FILED MAY 7, 1 04.

2 SHEETS-SHEET 1.

No.795, 644- 'PATENTED JULY 25,1905. H. OSBORNE.

SHUTTER WORKER.

I APPLICATION FILIZD MAY 17, 1904.

UNITED STATES PATEN T OFFIOE.

HEMAN OS BORNE, OF SPRINGFIELD, MASSACHUSETTS.

SHUTTER-WORKER.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed May 17, 1904. Serial No. 208,404.

To all whom, it may concern.-

Be it known that I, HEMAN OSBORNE, a citizen of the United States ofAmerica, and a resident of Springfield, in the county of Hampden andState of Massachusetts, have invented certain new and usefulImprovements in Shutter- Workers, of which the following is a full,clear, and exact description.

This invention relates to improvements in shutter-workers, the objectbeing to improve the shutter-worker of the character described inLetters Patent of the United States issued to me March 17, 1903, No.722,878, especially in respect of details of construction whereby theshutter-worker mechanism is more practicable of construction andconvenient in the assemblage of the parts thereof, operative withgreater nicety and smoothness, and with the entire avoidance of lostmotion.

Another object is to provide a novel, simplified, and unusuallyefiicient inclosing means for the portion of the mechanism which isexternal of the window-casing at which the shutter-worker is applied.

The invention consists in forms, constructions, and combinations ofparts. all substantially as hereinafter fully described, and set forthin the claims.

The improved shutter-worker is illustrated in the accompanying drawings,in which' Figure 1 is a vertical sectional view through a portion of thewindow-casing at which the device is applied through an upper portion ofthe blind or shutter and about centrally through the shutter-operatingmechanism. Fig. 2 is a horizontal sectional view through the casing andshowing the improved mechanism in plan view, the outer casing thereforbeing represented in horizontal section. Fig. 3 is a perspective view ofa bracket orsupporting part of the'device comprising separable sectionsand shown as separated from each other. Fig. 4 is a perspectiverepresentation of a fitting for the guidance of the operating-chainhereinafter referred to. Fig. 5 is a perspectix e view of the improvedinclosing casing for the external part of the operating mechanism.

Similar characters of reference indicate cor responding parts in all ofthe views.

The shutter-operating devices are formed and adapted for application inrelation to a window-casing which is suitably mortised or chambered forthe reception of a portion thereof.

In the drawings, A represents the back wheel. angularly formed and andhead 20 22, engaging through and under the slotted plate 23, affixed toan upper por} member of a bracket, which is adapted to be set againstthe outer side of the window-casing to overlie a mortise or chamber a,the

same having inwardly-extended opposite in tegrally-formed lugs orbracket members I) 5, having suitably alined holes in which are fittedthe extremities of a pin or round bar (Z, about which rotates theworm-wheel B, having end hubs the distance between the ends of whichcorresponds to the distance between the inner faces of the bracket-lugs,and one of the hubs at one side of the worm-wheel has a sprocket-wheel Oformed thereon or attached thereto. I

At the outer side of the bracket-plate A are provisions or equipments ofthe form represented in Figs. 2 and 3, the same consisting .of anintegral right-angularly and outwardly extending section f and aseparable similar shaped and matching section f said sections being ofstepped form or having the central rabbet g with the perforations 10through their faceWise-adjoined opposite ends, while the offset portions12 12 have the alined cir-- cular holes 13 13 to constitute journals forthe end gudgeons of a worm-wheel D. A space for occupancy is leftbetween the matchedtogether bracket-sectionsfandf as well also asprovision for the edgewise extension of the worm-wheel into mesh withthe worm B, by reason of the aperture 15 through the central portion ofthe bracket-plate A. One of the end hubs or gudgeons of the worm-wheel Dis suitably extended and formed square, receiving connection rigidlythereon of the shutter-operating lever F. The end portion of this lever,at which connection with the worm-wheel shaft is made, as shown in Figs.1 and 3, is shown as reinforced to give suitable length of bearingengagement by having the extremity of the comparatively thin strip fromwhich the lever is made doubled on itself, the'facewise-adjoinedportions having the square hole 18 through both thereof, and

a suitable flanged or headed screw 19 retains the lever in itsconnection with the worm- The outer extremity of the lever is providedwith a neck tion of the blind or shutter H. The means for turning theworm is here shown as a sprocket-chain G, an intermediate portlon ofwhich is in engagement around the sprocket- Wheel C, which is as onewith the worm, and the courses or extremities of the said chain areextended through holes 26 26, suitably formed transversely through thewindow-casing. Fittings J J are provided for the guidance and easyrunning of the courses of the chains from the horizontal positionsthrough the window-casing to the dependent positions therebelow, itbeing understood that the ends of the chains are extended to suitablylow positions for convenient access. Each of the said fittings J, asrepresented in Fig. 4:, consists of a split sleeve 32 having at its oneend portion downwardly-turned ears 33 33, between which a roller 3 islocated, the pin 35, engaged through the perforations therefor in thedepending ears 33, forming the journalsupport for the roller 34. Thesplit-sleevelike part is more or less elastic, so that it may be slippedinto the orifices of the hole 26 through the window-casing and expandingbe retained in place therein and without liability of accidentaldisplacement.

The inclosing casing for the part of the mechanism externally of thebuilding is shown as consisting of two semicylindrical shells 2171,having dimensions to fit or telescope partially one within the other andhaving base returnbent flanges k and extending around three sides of thebase portion of each casing-section 4;, the return-bent flanges beingarranged to overlap or partially telescope one another, as well as thecircular portions of the casingsections. The underturned-flange portions37, being under the inner or back edge of the bracketplate and heldconfined thereat, insure the retention of the inclosing-casing section'5 z in their places and without necessity of screws or other fasteningmeans, it being practicable to separate the parts one from another, asoccasion may require, to get at the internal mechanism of theshutter-operator.

In this shutter-worker the worm is made double-threaded, as may bedetermined by following the courses of the separate threads, which arein part represented by dotted lines in Fig. 2, the parallel doublethreads being of wide pitch, while the threads are arrangedcomparatively closely together, so that the thread of the worm engagingin comparatively fine teeth of the worm-wheel enables on a comparativelyslight degree of turning movement of the worm an extended and rapidmovement of the worm-wheel and shutter-operating lever, and thedouble-thread formation of the worm in combination with teeth of theworm-wheel, which are quite fine, does away with lost motion and lash,so that upon a pull of either depending extremity of the operating-chainthe shutter will be started instantly with the movement of the chain,and rattling 'or shaking of the shutter when placed in any of its givenset positions will be prevented.

The worm-wheel D having only a fraction of its toothed edge brought intomesh with the worm need not be a complete wheel, but may be a sectorworm-gear, as represented in Fig. 2 of the drawings, it being immaterialso far as the principle or capability of action is concerned whether ornot the teeth are extended entirely around the part and at its portionwhich is never brought around into engagement with the worm, for theshutter making but half a revolution between its closing and openingmovements necessitates only a range of movement of the worm-wheel ofhalf a rotation.

By having the fittings and appliances made as specifically described theassemblage of the operative parts is easily accomplished, and detachmentof the parts may be readily performed should occasion require in casereplacement becomes at any time necessary.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a shutter-worker, the bracket-plate A, having supporting membersat opposite sides and the combined worm and sprocket wheel journaled atone side of the plate and the wormwheel journaled at the other side ofthe plate and extending through the plate to mesh with the worm, meansfor rotating the worm, and a removable casing for inclosing thewormwheel and its supporting members. said casing consisting of twosections each having a shell portion and a base provided with a marginalgroove disposed at a right angle to the shell portion, the said twosections having their grooved portions slidably. engaging the marginaledges of the bracket-plate at opposite sides thereof and their shellportions inclosing the worm-wheel, substantially as described.

2. In a shutter-worker, the combination-of the supporting-bracket havingmounted thereon a united worm sprocket-wheel and a wormwheel in meshwith the worm, a shutter-operating lever carried by the worm-wheel, anda chain having an intermediate portion thereof running around thesprocket-wheel, and window-casing fittings for guiding the extremitiesof the sprocketwheel chain each consisting of a split tube havingseparated depending ears,-the journal-pins supported by and extendingfrom one to the other of said ears, and a roller on the pin.

Signed by me at Springfield, Massachusetts, in presence of twosubscribing witnesses.

HEMAN OSBORNE.

Witnesses:

A. V. LEAHY, WM. S. BELLOWS.

